I would suggest 3/4 times a week in combination with great cardio workouts like rowing and running.
http://instantfeelgood.blogspot.com/2008/06/how-to-tone-your-bum-part-2.html
those are suggestions of the exercises you can do for your glutes. And for your legs:
http://instantfeelgood.blogspot.com/2008/05/nice-legs_7918.html
I would suggest 3/4 times a week in combination with great cardio workouts like rowing and running.
http://instantfeelgood.blogspot.com/2008/06/how-to-tone-your-bum-part-2.html
those are suggestions of the exercises you can do for your glutes. And for your legs:
http://instantfeelgood.blogspot.com/2008/05/nice-legs_7918.html